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#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <sys/wait.h>
#include <stdlib.h>
#include "config.h"
#include "support.h"
static struct job_s {
struct job_s *next;
char *line;
pid_t pid;
} *jobHead, *fgJob;
static void
SigTransmit(int sig)
{
char *name, tmp[10];
#ifdef ONESHOT_SIGNAL
signal(sig, SigTransmit);
#endif
if (fgJob) {
switch(sig) {
case SIGINT: name = "SIGINT"; break;
case SIGTSTP: name = "SIGTSTP"; break;
case SIGQUIT: name = "SIGQUIT"; break;
default:
sprintf(tmp, "%d", sig);
name = tmp;
}
printf("%s: %s\n", name, fgJob->line);
if (sig == SIGTSTP) fgJob = NULL;
}
}
static void
SigCld(int sig)
{
int ps;
pid_t pid;
struct job_s *jbp, *jb1;
#ifdef ONESHOT_SIGNAL
signal(SIGCHLD, SigCld);
#endif
pid = wait3(&ps, WNOHANG, 0);
jb1 = NULL;
jbp = jobHead;
while (jbp) {
if (jbp->pid == pid) {
if (jbp == fgJob) fgJob = NULL;
if (jb1) jb1->next = jbp->next;
else jobHead = jbp->next;
free(jbp->line);
free(jbp);
return;
}
jb1 = jbp;
jbp = jbp->next;
}
}
pid_t
Exec(int argc, char *argv[], char *line)
{
pid_t pid=0;
char *new, *old;
old = getenv("PATH");
new = Malloc(strlen(old) + strlen(sysPPxP)
+ (usrPPxP ? strlen(usrPPxP): 0)
+ sizeof("rc/:") * 2);
if (usrPPxP) sprintf(new, "%s:%s/rc:%s/rc", old, usrPPxP, sysPPxP);
else sprintf(new, "%s:%s/rc", old, sysPPxP);
setenv("PATH", new, 1);
if ((pid = fork()) == 0) {
execvp(argv[0], argv);
exit(0);
} else if (pid == -1) {
perror("fork");
} else {
struct job_s *jbp;
jbp = (struct job_s *)Malloc(sizeof(struct job_s));
fgJob = jbp;
jbp->next = jobHead;
jobHead = jbp;
jbp->line = strdup(line);
jbp->pid = pid;
}
return(pid);
}
int
CmdJobs(int argc, char *argv[])
{
struct job_s *jbp=jobHead;
int n=1;
while(jbp) {
printf("[%d] %s (%d)\n", n ++, jbp->line, jbp->pid);
jbp = jbp->next;
}
}
int
CmdFg(int argc, char *argv[])
{
struct job_s *jbp=jobHead;
if (argc > 1) {
pid_t pid=0, pn=0;
if (*argv[1] == '%') pn = atoi(argv[1] + 1);
else pid = atoi(argv[1]);
while(jbp) {
pn --;
if (pid) {
if (jbp->pid == pid) break;
} else if (pn == 0) break;
jbp = jbp->next;
}
}
if ((fgJob = jbp) != NULL) kill(fgJob->pid, SIGCONT);
}
void
WaitJob()
{
if (fgJob) {
SetTerminal(FALSE);
while (fgJob) pause();
SetTerminal(TRUE);
}
}
void
InitSignals()
{
signal(SIGINT, SigTransmit);
signal(SIGTSTP, SigTransmit);
signal(SIGQUIT, SigTransmit);
signal(SIGCHLD, SigCld);
}
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